Sara was excellent at communication and reachable on a short notice. The place was in good condition and I didn't have many reasons to contact her. The wifi connection was strong. Very good security.
The check-in place was a little tricky. I arrived late, around 9 pm, and found the apartment keys and entry card (for operating the elevator) in the mailbox as promised. But I couldn't enter the elevator area itself just with them (the door opens only with a registered fingerprint, which you can register in the building management office during normal office hours). That wasn't explained to me beforehand and I was a little stressed until a nice neighbor allowed me to follow her into the elevator area.
The apartment is a two-bedroom unit. It's not very big, maybe around 50 square meters. It was clean but there were few cleaning supplies in the apartment so I ended up buying a broom and some cleaning cloths (I stayed nearly four weeks and couldn't just let things get dirty). There is a cleaning service on the ground floor and you can pay 500 baht to get the apartment cleaned if you wish.
The size was fine for three of us to stay but I wouldn't stay it's especially spacious.
The swimming pool on the rooftop is amazing, just like in the photos. Very little chlorine and meticulously maintained by the building staff. The small gym on the same floor was also good. Not too many equipments but good enough for staying fit.
The area is a little out of the center of Bangkok, but the BTS station is 7-10 minutes away on foot. I often took buses that run along the main street in front, Sukhumvit, and really liked having a few good restaurants nearby (the cafe just in front is excellent for both coffee and food, the Korean place on the second place above Seven-11 is super authentic, and many good Japanese options are in the area.
There is no big supermarket close by. The nearest ones are at On Nut and Ekamai (both one stop away from the Phra Khanong BTS station closest to the condo). It's somewhat walkable to get to them, but the walk is not pleasant nor short.
But the market on the other side of Sukhumvit Road has very cheap and high quality fruits. There is also a phenomenal German bakery just five minutes away.
It's not the best location if you are a tourist as most sights are quite far away (11 km) and a grab ride can easily cost 200 to 300 baht. But if you want to have a more authentic experience of Bangkok and have the convenience of going to Siam or Asok by BTS, it's a great option.
One last thing: the small massage shop around the corner on Sukhumvit Road is phenomenally good and very affordable. I don't mention the name here because I don't know if it gets censored but it's visible on the map application we all use.